Buffer Service Code 1 (changes)
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BufferManager
» SWI Calls
» Buffer_InternalInfo
» Service Codes
» Buffer Service Code 1
| Entry | |
|---|---|
| R0 | 1 (Reason code) |
| R1 | Internal buffer ID |
| R2 | Pointer to data to insert |
| R3 | Number of bytes to insert |
| R12 | Value returned by Buffer_InternalInfo |
| Exit | |
|---|---|
| R2 | Pointer to first byte not inserted |
| R3 | Number of bytes not inserted |
Use
This call inserts a block of data into a buffer. If the data has already been written to the buffer (i.e. R2 = buffer insertion address), then no data are copied but the buffer indices are updated. The C flag is set if the Buffer Manager is unable to transfer all data (i.e. R3 ≠ 0).
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